The ATH-CKS5TW in-ear headphones with Bluetooth® 5.0 technology pair powerful, high-fidelity sound with the convenience and freedom of a truly wireless design. Featuring auto power on/off, the headphones turn on and are ready to go as soon as you remove them from the included charging case. Features : - Powerful Solid Bass sound in a truly wireless design with Bluetooth® 5.0 technology for ultimate comfort and freedom of movement - Water-resistant performance (IPX2 drip-proof rating) protects headphones from dripping water, such as rain and sweat - Auto power function turns the headphones on when they’re removed from the charging case and turns them off and begins charging when they’re returned to the case - Built-in mic and buttons let you control music, calls, and volume without touching your smartphone - Exclusive 10 mm drivers with dual-layer diaphragm deliver clear, full-range audio with superb bass - Thin, flexible silicone eartips fit securely and improve high-frequency sound delivery - Included 3D loop supports can be used to provide an even more secure fit - Long-lasting battery life with 15 hours of continuous use on a full charge - Portable charging case gives you two additional charges for 45 total hours of on-the-go power - Qualcomm cVc™ (Clear Voice Capture) technology ensures you can have clear, natural-sounding conversations during calls - Compatible with high-quality Qualcomm® aptXTM audio and AAC codecs - Call audio plays in both headphones for greater clarity - Supports the Audio-Technica Connect app for convenient control of headphone settings Earphone Specification : Type : Dynamic Driver Diameter : 10 mm Frequency Response : 5 – 40,000 Hz Sensitivity : 110 dB/mW Impedance : 16 ohms Microphone Type : MEMS Microphone Sensitivity : -40 dB (1 V/Pa, at 1 kHz) Microphone Frequency Response : 50 – 4,000 Hz Microphone Polar Pattern : Omnidirectional Bluetooth® Version : 5.0 Operating Range : Line of sight - approx. 10 m (33')